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Add AEAD and GHASH functions

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This commit is contained in:
Zhi Guan
2023-02-13 23:29:27 +08:00
parent 236c6e17cb
commit 29af4f7f76
6 changed files with 557 additions and 10 deletions
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11
include/gmssl/aead.h
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@@ -15,6 +15,7 @@
#include <gmssl/sm3.h>
#include <gmssl/sm4.h>
#include <gmssl/zuc.h>
#include <gmssl/gcm.h>
#ifdef __cplusplus
extern "C" {
@@ -60,16 +61,22 @@ int sm4_ctr_sm3_hmac_decrypt_finish(SM4_CTR_SM3_HMAC_CTX *ctx, uint8_t *out, siz
typedef struct {
SM4_CTR_CTX enc_ctx;
GHASH_CTX mac_ctx;
uint8_t Y[16]; // E(K, Y_0)
size_t taglen;
uint8_t mac[16];
size_t maclen;
} SM4_GCM_CTX;
int sm4_gcm_encrypt_init(SM4_GCM_CTX *ctx,
const uint8_t key[SM4_KEY_SIZE], const uint8_t *iv, size_t ivlen,
const uint8_t *aad, size_t aadlen);
const uint8_t *aad, size_t aadlen, size_t taglen);
int sm4_gcm_encrypt_update(SM4_GCM_CTX *ctx, const uint8_t *in, size_t inlen, uint8_t *out, size_t *outlen);
int sm4_gcm_encrypt_finish(SM4_GCM_CTX *ctx, uint8_t *out, size_t *outlen);
int sm4_gcm_decrypt_init(SM4_GCM_CTX *ctx,
const uint8_t key[SM4_KEY_SIZE], const uint8_t *iv, size_t ivlen,
const uint8_t *aad, size_t aadlen);
const uint8_t *aad, size_t aadlen, size_t taglen);
int sm4_gcm_decrypt_update(SM4_GCM_CTX *ctx, const uint8_t *in, size_t inlen, uint8_t *out, size_t *outlen);
int sm4_gcm_decrypt_finish(SM4_GCM_CTX *ctx, uint8_t *out, size_t *outlen);

14
include/gmssl/gcm.h
View File

@@ -44,6 +44,20 @@ extern "C" {
void ghash(const uint8_t h[16], const uint8_t *aad, size_t aadlen,
const uint8_t *c, size_t clen, uint8_t out[16]);
typedef struct {
gf128_t H;
gf128_t X;
size_t aadlen;
size_t clen;
uint8_t block[16];
size_t num;
} GHASH_CTX;
void ghash_init(GHASH_CTX *ctx, const uint8_t h[16], const uint8_t *aad, size_t aadlen);
void ghash_update(GHASH_CTX *ctx, const uint8_t *c, size_t clen);
void ghash_finish(GHASH_CTX *ctx, uint8_t out[16]);
int gcm_encrypt(const BLOCK_CIPHER_KEY *key, const uint8_t *iv, size_t ivlen,
const uint8_t *aad, size_t aadlen, const uint8_t *in, size_t inlen,
uint8_t *out, size_t taglen, uint8_t *tag);